methenamine methemoglobinuria • methene · · · Info · Definitions · Synonyms · Characters · · methenamine · · Text Latin · · Script 11 · · Length 4 · · Syllables Definitions · · · (noun) antibacterial agent (trade names Mandelamine and Urex) that is contained in many products that are used to treat urinary infections. Synonyms: Mandelamine, Urex. · · Noun Definition 1 Synonyms · · · mandelamine · · Synonym 1 urex · · Synonym 2 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074